Differential cross sections of elastic electron scattering from CH₄, CF₄ and SF₆ in the energy range 100--700eV

We investigate the differential cross sections (DCS) of elastic electron scattering from CH_4, CF_4 and SF_6 at six impact energies in a range of 100--700 eV by employing the independent atom model (IAM) together with the relativistic partial waves. The atom is present in an optical potential which is complex, spherically symmetric, and energy dependent. The optical potential of the atom is the sum of the direct static, dynamic polarization, local exchange and modified absorption potentials. The results obtained by using a modified absorption potential show significant improvements on the unmodified absorption potential results. The present results are generally in good agreement with experimental data available. In addition, the present results indicate that the structure of molecule manifests the observable effects on electron--molecule scattering.